As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
(CAN) AFT CARGO BAY SMOKE DETECTOR WILL NOT TEST. MAINTENANCE.SUNSEQUENT TO THE ABOVE A SYSTEM CHECK WAS CARRIED OUT. NO DEFECTS FOUND. DETECTOR REMOVED S/N 676. INSTALLED 30/10/02. TIS 31.2 HOURS. THE INSTALLATION OF THESE SMOKE DETECTORS WAS MANDATED BY SWEDISH AD 1-151 TO IMPROVE RELIABILITY. CONSULTATION WITH SAAB REVEALED 12 CONFIRMED FAILURES ON FAA REG AIRCRAFT IN THE PAST 12 MONTHS.